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2018 Map of Central Isles Dernieres

Name: 2018 Topographic Map of Central Isles Dernieres
Creator: U.S. Geological Survey
Published: 2018
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2018

About this map

Whiskey Island stands as a prominent remnant of the coastal barrier system along the Gulf of Mexico in this Terrebonne Parish survey. The landscape is defined by its fluid transition between open water and fragmented marshland, where tidal features like Whiskey Pass and Coupe Nouvelle facilitate the exchange of water between the Gulf and interior basins. The map illustrates a highly dynamic environment of bays and inlets, including Bay Wilson, Bay Round, and the larger Pelican Lake.

Inland water bodies are connected by a network of bayous, such as Pelican Bayou and Flat Bayou, which weave through the low-lying terrain. These waterways, along with Caillou Boca and the northern reaches of Caillou Bay, highlight the intricate hydrography of the Louisiana coast. This record of the Isles Dernieres chain provides a precise accounting of shoreline configuration and aquatic navigation channels in the early twenty-first century.